Electric-lighting fixture



LEROY e. CLARK.

ELECTRIC LIGHTING FIXTURE. APPLICATION FILED DEC.27, I920- EAQQLSGO. Patented Aug. 22, 1922;.

I I I I-wuantoz 7 i8 i I I 3 Q 82 aflowm d uui r series I QFFlCEm LE ROY s. CLARK, or DETROIT, MICHIGAN.

ELECTRIC-LIGHTING FIXTUR To all toil om it may concern:

Be itknown that 1, Ln Roy G. CnARx, a citizen of the United States of America, re-

siding at Detroit, in the county of Wayne and State of Michigan, have inventedcertain new and usefullmprovements in Electric- Lighting Fixtures, of which the following is a specification,.reference being had therein to the accompanying drawings.

.This invention relates to electric lighting fixtures and has for an object the provision oit'simple, inexpensive, compact and ornamental. means for furnishinga direct and unobstructed downward illumination suitablefor reading or. for lightingthe top of atable. 1

Another object is the provision of a dining room fixture by which the table may be brilliantly lighted by alamp which is entirely concealed from view except from points between the lamp and the table and whereby the glare of unprotected lights is entirely obviated. V

. Another; object is to provide a combination fixturein which a series of lamps for general lighting. of alroom are arranged to be used in conjunction with a lamp directed downwardly. i

. I attainthese and other objects bythe use in a general lighting fixture 01": a lens secured in the lower endof a hollow casing formed of an opaque material, preferably metal, the casing having therein alamp situated so that its rays are directed by the lens Within a limited areabeneath the lamp.

In the drawing,

Figure 1 is a vertical section of the central portion of the fixture, showing one preferred embodiment of my invention;

Fig. 2 is a plan view of the main casting;

Fig. 3 is a perspective view of one of the blocks used to secure a candle bracket to the casting; and

Fig. 4 is an elevation showing the relation of the fixture to a table when used as a dining room light.

A suspension member 1 has an internally threaded bore 2 in which is secured a short nipple 3. On the opposite end of the nipple is secured an open fitting 4 which supports a second nipple 5. A central memberformed as a casting 6 having a central opening 7 is mounted on the nipple 5 and maintained in poistion by a nut 8. Clamped between the support 1 and the casting 6 is an upper casing comprising ornamental casing members Application filed December 27, 1920. Q Seria1-N'o.433,444.

Specification of Iietters Patent. Patented 10, and 11, these members being of any des red contourzand' serving to conceal the. sup.- porting ,tubularmembers3, 4 and 5. J1

lt willbe seen that the suspension member 1 is secured firmly to;the central member 6 by the-fittings 3,4, and 5 holding the casting sage-l7 forfthe wi'res of'the electric circuit.

A threaded bore 18in the bottom of the block is provided to receive a screwstud19 which fastens the block 13 tothe casting 6 in position between two of theribs 12. A cover plate 6 assists'in securingthe blocks 13 inthe casting 6. i Y

-A hollow casing 20 shown as conveniently v madeof tubular ornamental sections 21, 22 and 23 is secured to the casting 6 by the studs 19, the screw threaded end ofthe studs passing through holes in a flange 24: of theupper section 21. .The'section's 21, 22 and 23 may be solderedtogeth'er.' .l/Vithinthe casing-20,- upon an adjustable bracket 25 which is secured to the nut 8, is the socket 26 for the lamp 27, the filament of which is supported near the lower end of the casing 20.; The end of the casing section 23 is threaded'to receive. a cap 28*adapted to hold a lens 29 0f the ordinary plano-convex type commonly used in portable search'lights.

A lens of this type directs the light of e lamp as a conical beam and when viewed from the si-dedoes not show as a brilliant source of light. While it provides an eflicient illumination within the cone of light, it does not appear as a glaring object to tire the eyes. l I v 3 To produce various color efiects, discs of glass suitably tinted will be provided, the chosen disc being placed upon the upper surface of the lens 29 as indicated at 39.

By adjusting the lamp 27, the extent of the area of illumination can readily be c0ntrolled.

The bracket arms 16 act as supports for lamps (not shown) placed within the globes 30 and serving for general illuminationof the room. The central member 6 together with its connections to the suspension mem-' her 1 thus forms a support for the main bracket lamps and for the adjustable bracket lamp and its casing.

The bracket lamps are indicated as ar= ranged in parallel on a circuit controlled by a suitable switch 31 securedon the side of the casing section 22 or in any other convenient location. As shown, the wires 32, 33 and 37, form the circuit for the lamp 27 and this circuit is not controlled by the switch 31. The wires 32, 34, 35, 36and 37 form the circuit for the lamps in the globes 30, and this circuit is under the control of the switch 31 which may be operated by the button 38 or in any preferred manner. The circuit for the lamp 27 will have another switch located wherever desired. This wiring is merely illustrative, and it is to be understood that the circuits may be arranged to suit the convenience of the user.

The fixture may be shipped with the Wires in place in the upper and lower casings and in the arms 16. The blocks 13 will be detached by theremoval of the screw studs 19, and the-lower casing will be held to the casting 6 by temporary fastening means engaging the studs 19. The passage 17 is cored when the block 13 is cast and it affords a smooth passage for the wires thus obviating the danger of breakage and tearing of the insulation which so frequently occurs in the use of the ordinary fixture body with the rough nipples and other fittings now in common use. To assemble the fixture, the studs 19 will be unscrewed from the temporary fastenings, and the nut 8 unscrewed from the nipple 5. The blocks 13 will then be set 1 between the ribs 12, and the cover plate and upper casing will be clamped upon them by the nut 8. The casing 20 will then be secured to the blocks 13 by inserting the studs 19 and the fixture is ready for use. This simplicity of assembly and the absence of rough and sharp edges to injure the insulaan opening in the support and engaging a screwthreaded aperture in the block.

2. An electric lighting fixture comprising a support, a plurality of lamps carried by brackets secured to the support, the bracket for one of the lamps being adjustable to regulate the distance of the lamp from the support, and a casing secured to the support and enclosing the adjust-able lamp, the casing having a plano-convex lens mounted in an opening beneath the lamp to direct the light from the lamp within a limited area.

3. An electric lighting fixture comprising a support, a plurality of lamps carried by brackets secured to the support, the bracket for one of the lamps being adjustable to regulate the distance of the lamp from the support, and a casing secured to the support and enclosing the adjustable lamp, the casing having a plano-convexlens mounted in an opening beneath the lamp to direct the light from the lamp within a limited area, the lamp within the casing having a separate circuit from. that of the other lamps,

and a switch mounted on the casing controlling only the circuit of the other lamps.

In testimony whereof I afiiX my signature in presence of twowitnesses.

LE ROY G.- CLARK.

lVitnesses: I

Lnwrs E. FLANDERS, ARTHUR MINNIOK. 

